Expanding Trig Definitions

Expanding Trig Definitions

April 29, 2021

Open Ended

What is an acute angle?

Multiple Choice

What ratio should we use on this triangle?

• Sine (sin)

• Cosine (cos)

• Tangent (tan)

Inverse Trig Ratios

Recall from Unit 1: Inverses "reverse" a function.

Multiple Select

Find x.

• $\cos^{-1}\left(\frac{1}{2}\right)$

• $\arccos\left(0.5\right)$

• $30\degree$

• $\cos\left(\frac{45}{90}\right)$

Open Ended

How many degrees make a full rotation?

In other words, what is the biggest (unique) angle we can measure?

Poll

Do trig ratios apply to non-acute angles? Can we make sine, cosine, and tangent work for any angle?

• Yes

• No

Multiple Choice

Positive angles go...